Loom shuttle



D884 1938. P. L. SPENCER- 2,140,060

LOOM SHUTTLE Filed Nov. 22, 1937 a, amp

Patented Dec. 13, 1938 UNITED STATES PATENT OFFICE LOOM SHUTTLE.

Philip L. Spencer, Millbury, Mass., assignorto Watson-Williams Manufacturing Company, Millbury, Mass, a corporation of Massachusetts Application November 22, 1937, Serial No. 175,820 3 Claims. (01. 139-221) This invention relates to loom shuttles and Certain kinds of weft and particularly rayon more particularly to shuttles of the self-threading cause excessive wear of surfaces over which they type, such as are used in automatic weft-replenare drawn, and such wear on the wood shoulder ishing looms. adjacent the pin l6 causes the shoulder to be- It is the general object of my invention to imcome badly worn and deeply grooved, so that the =5 prove the construction of such shuttles in such weft thread is often caught and broken thereby.

manner that the life of the shuttle will be pro- In my improved construction, I provide a guide longed and the performance thereof will be renplate 2i] which is mounted in a correspondingly dered more satisfactory. shaped recess in the shuttle body immediately to 10 To the attainment of this object, I provide imthe left of the pin l6, as clearly shown in Figs. 10 proved means to guide the weft thread as it leaves 1 and 3. The guide plate 20 is formed as an the shuttle eye and to prevent excessive wear of elongated plate 2| which is concave in cross the shuttle adjacent said eye. By the provision section, as clearly shown in Fig. 5. of such means, I avoid the weft breakage pre- The right-hand end of the plate, as viewed in viously common in shuttles in which excessive Fig. 3, is also curved rearwardly as indicated at 15 wear adjacent the shuttle eye had taken place. 24 and is provided with a flat rearward extension My invention further relates to arrangements or flange 25. In its middle portion, the guideand combinations of parts which will be hereplate is rearwardly offset or dished as indicated inafter described and more particularly pointed at 26 to provide a depressed portion in which the 20 out in the appended claims. head of a screw 21 is seated. The screw 21 is 20 Preferred forms of the invention are shown in the usual binding screw provided for securing the the drawing, in which threadingblock 10 in its recess in the shuttle Fig. 1 is a side elevation of a self-threading body. shuttle embodying my improvements; The groove [9 varies somewhat in its vertical 25 Fig. 2 is a sectional end elevation, taken along position with reference to the screw 21. To 5 the line 2-2 in Fig. l; accommodate such variations,Ihave provided the Fig. 3 is a partial sectional plan view, taken alternative constructions shown in Figs. 4, '7 and along the line 3-3 in Fig. 1; 8. In Fig. 4 the recessed portion 26 is below the Fig. 4 is a front elevation of a guide plate, center of the plate 20, while in Fig.7 the recessed 30 looking in the direction of the arrow 4 in Fig. 3; 'portion 38 is symmetrical with the plate 31, and 3 Fig. 5 is an end view, looking in the direction in Fig. 8 the recessed portion M1 is above the cenof the arrow 5 in Fig. 4; ter of the plate M.

Fig. 6 is a sectional elevation, taken along the In Fig. 9 I have shown the plate 3| mounted in line 6-6 in Fig. 4; a self-threading shuttle S having a threading Figs. 7 and 8 are views similar to Fig. 4 but eye of slightly different construction. In the 35 showing slightly modified constructions; and shuttle S, the lower portion of the threading Fig. 9 is a partial side elevation of a different passage 60 is formed between adjacent portions type of self-threading shuttle, having a guide- BI and 62 of the wood shuttle body, guide-pins 63 plate corresponding to the-construction shown in being provided on each side of the delivery out- Fig. '7. let 64. Furthermore, the groove 65 is lower than 40 Referring to Figs. 1, 2 and 3, I have shown a in the shuttle S, so that the screw 21 is horizonportion of a shuttle S having a metal threading tally aligned therewith, permitting the use of the block Ill mounted near the front end thereof, symmetrical guide-plate shown in Fig. 7. which block has a depending portion ll cooperat- Having described the details of construction of ing with a horn I2 to provide athread passage Hi my invention, the use and advantages thereof 45 through which the weft thread enters the delivery will be readily apparent. The weft W (Fig. 3) outlet l5. passes from the guide-pin I6 in an easy curve Pins l6 and I! of steel, glass or porcelain are over the po ion 24 0f the -p ate 20, which inserted at the two sides of the delivery passage guide-plate is concavely grooved lengthwise and I5. The pin l6 resists the wear of the weft thus provides the necessary clearance to receive 50 thread as the shuttle is moving to the right in the thread between the guide plate and the ad- Fig. 1. As the thread leaves the pin IE, it is J'acent side of the shuttle box. drawn over a shoulder, which in the usual con- The guide plate is preferably formed of sheet struction is formed in the wood of the shuttle metal which is relatively hard and which will body at the end of athread groove l9. receive and retain a high polish. Thus con- 55 structed, the guide plate will resist the wear of the thread throughout the life of the shuttle, and the cutting or grooving of the shuttle body adjacent the shuttle eye is effectively prevented.

My improved guide plate not only possesses the advantages above outlined, but also provides a more firm and substantial seat for the head of the screw 27 which retains the threading block in position in the shuttle body.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:-

1. In a, self-threading loom shuttle having a thread groove in its side surface, a threading block, a cross screw to secure said block in the shuttle body, a threading slot and a side outlet for the thread, that improvement which consists in providing a guide-plate for the thread as it is drawn from said outlet along said thread groove, said guide-plate having a rearward countersunk projection which extends into the body of the shuttle and receives the head of said cross screw below its thread-engaging surface and which provides a firm and enduring seat therefor.

2. In a self-threading loom shuttle having a thread groove in its side surface, a threading block, a cross screw to secure said block in the shuttle body, a. threading slot and a side outlet for the thread, that improvement which consists in providing a guide-plate for the thread as it is drawn from said outlet along said thread groove, said guide plate being horizontally elongated and being concave in vertical cross section to correspond to said thread groove, and being rearwardly curved in horizontal cross section adjacent said thread outlet.

3. In a self-threading loom shutle having a thread groove in its side surface, a threading block, a cross screw to secure said block in the shuttle body, a threading slot and a side outlet for the thread, that improvement which consists in providing a guide plate for the thread as it is drawn from said outlet along said thread groove, said guide-plate being horizontally elongated and being concave in vertical cross section to correspond to said thread groove and beingvprovided with a rearwardly extending flange at the end thereof adjacent said thread outlet.

PHILIP L. SPENCER. 

